REXROTH EFC 3600 - E4: Error and Protection; Protection Configuration

8.10 E4: Error and Protection
8.10.1 Protection Configuration
E4.00: Reserved
E4.01 Overvoltage prevention setting
Setting range 0 ~ 2
Minimum unit 1
Factory default 0
● 0: Both disabled
●
1: Stall protection enabled, braking disabled
● 2: Stall protection disabled, braking enabled
When [E4.01] = 0 / 1, the brake chopper will not work even its action point is
reached.
When [E4.01] = 2, the brake chopper is enabled with the set braking duty cycle
if its action point is reached, no matter the frequency converter is in stop or run-
ning mode.
Two factors decide the switching pattern: Maximum duty cycle and hysteresis
voltage.
Maximum duty cycle
The switching time of the brake chopper is limited with parameter S3.21. If the
value is set too low, the over voltage error may happen during braking.
● The time t2 = 1/100 Hz = 10ms
● The time t1 = t2 x [S3.21]/100 %
If the switching of the brake chopper is controlled by the maximum duty cycle,
the switching pattern is shown as below:
Fig. 8-46: Switching pattern_maximum duty cycle
Hysteresis voltage
The hysteresis voltage of braking is fixed as below:
EFC 3600
Bosch Rexroth AG
Parameter Settings
DOK-RCON03-EFC-3600***-IT03-EN-P
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